HYDRAULIC UNSCREWING DEVICE Calculations/Specifications
Thread Lead = 1/(Threads per inch) = 1/Pitch = Inches/Thread Thread Length = Length of threads to be removed from the cap A. Stroke (Inches) NOTE: Limit switches should be used if possible to limit full cylinder travel. This will extend the seal life inside the hydraulic cylinder.
a) Required revolutions (thread core) Thread Length =
+ Safety (.5 revolutions minimum)
Thread Lead b) 1. Required stroke – Inches = Gear Pitch Diameter x π x Required Revolutions If required stroke is too long, a cogwheel transmission should be used. 2. Length of Rack b 2 = x + y + b 1 c) Stripper stroke (Inches) = Cylinder Stroke – Required Rack Stroke
ATTACHED TO MOLD
STATIONARY HYDRAULIC CYLINDER
MOVING RACK
BACK VIEW, THREADED CORES EXTEND FROM OTHER SIDE OF THE SPUR GEAR
PITCH CIRCLE – PITCH DIA. x PI SPUR GEAR
Y = MAXIMUM PRODUCT SPACING (MULTIPLE CAVITIES CAN BE LOCATED BETWEEN)
> PITCH DIA. PERIMETER x REVOLUTIONS b 1
X
REQUIRED STROKE TO UNSCREW CAPS
UNUSABLE SPACE
b 2
104
U.S. 800-626-6653 ■ Canada 800-387-6600 ■ . Mexico 52-442-713-5666 ■ . dme.net ■ store.dme.net
Made with FlippingBook - professional solution for displaying marketing and sales documents online